A. This stem fixing screw is suitable for mountain bikes and road bikes, and it can firmly fix the handlebars and brake levers. It is made of metal, specifically titanium alloy, and has a good quality, being strong and durable. It can withstand various pressures and frictions during the riding process, ensuring riding safety. B. In terms of specifications, the screw size is M5*18mm, with a hollow design, and there are 6 pieces in each pack. This specification of screws has relatively strong adaptability and can better meet the fixing needs of relevant bicycle parts. C. It has a wide range of applications and is mainly used to fix the handlebars and brake levers of bicycles, making the bicycle's control more stable and reliable. Whether it is for daily riding, mountain exploration or road racing, it can provide strong support for riders. D. This product is sold in regions such as Europe, South America, Southeast Asia, North America and Northeast Asia, and its quality has been widely recognized.